在水中拆卸嵌段共聚物胶束所需的力。

Force required to disassemble block copolymer micelles in water.

机构信息

Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, PR China.

出版信息

Langmuir. 2010 Jun 15;26(12):9183-6. doi: 10.1021/la101235e.

DOI:10.1021/la101235e

PMID:20465263

Abstract

The force required to disassemble block copolymer micelles in water has been directly investigated via atomic force microscopy-based single-molecule force spectroscopy. The force needed to disassemble block copolymer micelles of poly(acrylic acid)-polyfluorene-poly(acrylic acid) in water is found to be 23 pN. The force increases as the stretching velocity increases, indicating that micelle disassembly is a dynamic process. In addition, the disassembly force is sensitive to the properties of the solvents. This study represents the first attempt to employ single-molecule force spectroscopy to directly measure the force needed to disassemble block copolymer micelles in water.

摘要

通过原子力显微镜（AFM）单分子力谱技术，直接研究了在水中拆散嵌段共聚物胶束所需的力。实验发现，拆散聚（丙烯酸）-聚芴-聚（丙烯酸）嵌段共聚物胶束所需的力为 23pN。当拉伸速度增加时，力也随之增加，这表明胶束的拆散是一个动态过程。此外，拆散力对溶剂的性质也很敏感。本研究首次尝试使用单分子力谱技术直接测量在水中拆散嵌段共聚物胶束所需的力。